Passive income is really the way forward, it can give you additional funds to supplement your main job. It if its viable you may be able to move on to it full time if it works out !
My first question is what kind of financial industry is you day time role, am I right to assume its the debt management insolvency line of work (If I were you I would get a website and use that as your signature instead)
Because your day job is financially orientated I guessing you need relevant qualifications with the financial governing bodies of your specific country. If you do and you have then brilliant then you could start offering financial advice outside of work hours, which I'm sure will be high paying.
If you don't have any financial awards perhaps you could start some sort of financial affiliate site, Google the term if you've never heard of it before.
I think sticking close to something you do is the way forward. I work with lighting equipment all day so I chose to do that in my spare time for some extra work.
Hope I helped
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